Compare timestamps for two files

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  Hi,

  You can use the LastWriteTime property to test against.

  Example:

  
  (Get-Item .\file1.txt).LastWriteTime -lt (Get-Item .\file2.txt).LastWriteTime

  
  

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  Thursday, October 1, 2015 11:48 AM
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  Another way is calculate the difference between the timestamps

  [datetime](Get-ItemProperty -Path $file1 -Name LastWriteTime).lastwritetime -[datetime](Get-ItemProperty -Path $file2 -Name LastWriteTime).lastwritetime

  If the result is negative the $file1 is older. Deliver more information on this two files. 

  Thursday, October 1, 2015 12:02 PM
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  Mike, Guy, thanks. Let me show what I get now, but have no idea where the mistake is:

  "Get-ChildItem \\birepoprod\CRECHA\*.zip | Foreach-Object {if ('\\birepoprod\CRECHA\'+$_.LastWriteTime -gt (Get-ChildItem $_.loaded).LastWriteTime) {1} else {$_.Name}}" 

  
  

  
  

  • Edited by Roman Kuritsyn Thursday, October 1, 2015 12:09 PM mistake

  Thursday, October 1, 2015 12:08 PM
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  What exactly are you trying to determine?

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  Thursday, October 1, 2015 12:11 PM
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  I need:

  for each .zip file in the folder find .loaded (postfix) file compare timestamps. If .zip file is newer then .loaded then remove .loaded

  

  Thursday, October 1, 2015 12:14 PM
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  Get-ChildItem $_.loaded is not correct - delivers nothing. Trying something like this

  $loaded = Get-ChildItem $_.name
  if ($loaded -like '*loaded*') 
  {
    ...
  }
  else
  {
    ...
  }

  
  

  
  
  

  • Edited by Guy Jascht Thursday, October 1, 2015 12:29 PM

  Thursday, October 1, 2015 12:27 PM
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  I need:

  for each .zip file in the folder find .loaded (postfix) file compare timestamps. If .zip file is newer then .loaded then remove .loaded

  Here's a framework:

  Get-ChildItem .\*.zip | ForEach {
  
      $zip = $_
  
      $loaded = Get-Item (Join-Path -Path $zip.Directory -ChildPath "$($zip.BaseName).loaded")
  
      If ($zip.LastWriteTime -gt $loaded.LastWriteTime) {
  
          Write-Host "$($zip.Name) is newer than $($loaded.Name)" -ForegroundColor Green
          Remove-Item -Path $loaded.FullName -WhatIf
  
      } Else { 
      
          Write-Host "$($loaded.Name) is newer than $($zip.Name)" -ForegroundColor Red 
          
      }
  
  }
  

  
  

  This will not remove anything yet. If you like the results, remove the -WhatIf switch and run it again to do the actual removal.

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  • Edited by Mike Laughlin Thursday, October 1, 2015 12:39 PM

  Thursday, October 1, 2015 12:36 PM
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  it seems like I find the way:

  "Get-ChildItem \\birepoprod\CRECHA\*.zip | Foreach-Object {if ($_.LastWriteTime -gt (Get-Item $_'.loaded').LastWriteTime) {rm $_'.loaded'} else {ls $_}}" 

  
  

  Thank you anyway for ideas!

  
  

  • Marked as answer by Roman Kuritsyn Thursday, October 1, 2015 12:38 PM
  • Edited by Roman Kuritsyn Thursday, October 1, 2015 12:38 PM shorter

  Thursday, October 1, 2015 12:38 PM